Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e98d9d0ef6efb4…

MALICIOUS

PDF

91.3 KB Created: 2021-03-14 21:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d0a7a70abff4c187ee04993331523d6 SHA-1: c6b675cfc95dc17faae65fdd9675b53e63123072 SHA-256: 77e98d9d0ef6efb45b5ba6db5e174f0b30a5b88f08e4a53f3b57c8bf39ad1844
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/wix?keyword=crrel+permafrost+research+tunnel PDF link annotation
    • http://tojiritukimafom.iblogger.org/vuxixejekuvamuvegeret.pdfIn PDF document text
    • http://podarokinsta.online/uefa_champions_league_match_attax_2019_20_topps78kka.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/summer_baby_monitor_replacement_battery.pdfIn PDF document text
    • http://bazis-rostov.com/52114402370rg863.pdfIn PDF document text
    • http://dhl-order.info/how_to_write_a_speech_about_yourself_templatev75o1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://denotepisijolib.rf.gd/risk_assessment_software_template.pdfIn PDF document text
    • http://tomijejimener.epizy.com/michelin_star_restaurants_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/assemblies_of_god_logo_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/betterme_calm_sleep_meditation_mod_apk.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_206b0d79a561419198b6ef7dee91671c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da012410-a781-4dad-84b6-5aa5e631c660/97987175438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79723a09-ac96-4bae-900b-09bfa0b8d304/jemumoti.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/99117856157.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_048b00680b7f40c4a992849fb3290ed1.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_fb8afd931c1e4deab2ae4309890c9191.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xopugup/29551553000.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/setipupabonabijij.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/89056176278.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/wenifujixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b917ef82-3b53-4eb7-aeb4-bde4783c26ee/gevobodelofixiven.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/24_gauge_stainless_steel_sheet_metal.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_f20c8595614b42229f9a37c516cce6f8.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_7df9449f786542c584d979811eed3b0a.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12851 5160 bytes
SHA-256: 697467bb90ce1e4e778cd20485ac643606ee22c82c57a184d64bf6497128e3b3
font_01_sfnt_off000139ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AE 10676 bytes
SHA-256: a2cb384e788bd33367bdf5627e19a2d598f414f9ba2fdfa176d207cf2361a906

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